If someone (davean?) is to fix umwelt.xkcd.com, please make sure it's available via HTTPS too. And while you're at it, also remove the http: parts in waldo.js. That way we're not stuck with a broken comic because of 'mixed content' being blocked by our browsers.

"Umwelt" changed based on where and how you viewed it, and also apparently when. I think it's quite appropriate that it's now invisible.

Unless stated otherwise, I do not care whether a statement, by itself, constitutes a persuasive political argument. I care whether it's true.---If this post has math that doesn't work for you, use TeX the World for Firefox or Chrome